export const notFound = (req, res, next) => {
  res.status(404).json({
    error: "Not Found",
    message: `Cannot ${req.method} ${req.originalUrl}`,
  });
};

export const errorHandler = (err, req, res, next) => {
  console.error("Error:", err);

  // Handle validation errors
  if (err.name === "ValidationError") {
    return res.status(400).json({
      error: "Validation Error",
      details: err.errors,
    });
  }

  // Handle duplicate key errors
  if (err.code === 11000) {
    return res.status(400).json({
      error: "Duplicate Entry",
      message: "A record with this value already exists",
    });
  }

  // Handle JWT errors
  if (err.name === "JsonWebTokenError") {
    return res.status(401).json({
      error: "Invalid Token",
      message: "Your session is invalid",
    });
  }

  // Default error
  const statusCode = err.statusCode || 500;
  res.status(statusCode).json({
    error: err.message || "Internal Server Error",
    ...(process.env.NODE_ENV === "development" && { stack: err.stack }),
  });
};